How to insert a hash in an ActiveRecord column on Ruby On Rails

My Dev Env

Rails 6.0.3.4

sqlite3

ruby 2.6.3

and a RoR n00B

My Model Goal has a few attributes like title ,created_on etc. Essentially standard types like text,date,boolean etc.

I have validations in place,I am able to read from DB, post from form etc.CRUD operations are fine.So far so good.

Now I want to add a new column called tracking_data which will be a type of hash like this

  {
    21-12-2020:true,
    22-12-2020:false,
    etc
    etc
  }

The idea is goal will have a column called tracking_data like above which is essentially a hash of { date:bool }. It simply records if on a particular date(key), the user has worked on the goal.True or false(value). Essentially the user will select a date, check/uncheck the status for the date in the form. I am using sqlite3 currently. As mentioned here from the official docs https://api.rubyonrails.org/classes/ActiveRecord/Store.html, I am trying to implement the same. What I have done so far, and which obviously is not correct is define something like

store :tracking_data, accessors: [ :date, :status] on the goal.rb model file. By virtue of the store wrapper, I get access to the date and status accessor methods on goal. Which I use to read inputs from the form. The form code looks like this

  <%= form.date_field :date %>
  <%= form.check_box :status %>

So my query is

How can I read the date input by the user from the form along with the status and set that as key/value in the tracking_data hash.

Basically I should not be passing the :date attribute in the store function, because that has to be input by the user.

Additional I am using the default Yaml serializer with store. Any help is appreciated and please let me know If I can clarify this further.

Thank you